/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cutils/bitops.h> /* for popcount() */
#include <audio_utils/primitives.h>
#include "private/private.h"
void ditherAndClamp(int32_t* out, const int32_t *sums, size_t c)
{
size_t i;
for (i=0 ; i<c ; i++) {
int32_t l = *sums++;
int32_t r = *sums++;
int32_t nl = l >> 12;
int32_t nr = r >> 12;
l = clamp16(nl);
r = clamp16(nr);
*out++ = (r<<16) | (l & 0xFFFF);
}
}
void memcpy_to_i16_from_u8(int16_t *dst, const uint8_t *src, size_t count)
{
dst += count;
src += count;
while (count--) {
*--dst = (int16_t)(*--src - 0x80) << 8;
}
}
void memcpy_to_u8_from_i16(uint8_t *dst, const int16_t *src, size_t count)
{
while (count--) {
*dst++ = (*src++ >> 8) + 0x80;
}
}
void memcpy_to_i16_from_i32(int16_t *dst, const int32_t *src, size_t count)
{
while (count--) {
*dst++ = *src++ >> 16;
}
}
void memcpy_to_i16_from_float(int16_t *dst, const float *src, size_t count)
{
while (count--) {
*dst++ = clamp16_from_float(*src++);
}
}
void memcpy_to_float_from_q4_27(float *dst, const int32_t *src, size_t count)
{
while (count--) {
*dst++ = float_from_q4_27(*src++);
}
}
void memcpy_to_float_from_i16(float *dst, const int16_t *src, size_t count)
{
while (count--) {
*dst++ = float_from_i16(*src++);
}
}
void memcpy_to_float_from_p24(float *dst, const uint8_t *src, size_t count)
{
while (count--) {
*dst++ = float_from_p24(src);
src += 3;
}
}
void memcpy_to_i16_from_p24(int16_t *dst, const uint8_t *src, size_t count)
{
while (count--) {
#ifdef HAVE_BIG_ENDIAN
*dst++ = src[1] | (src[0] << 8);
#else
*dst++ = src[1] | (src[2] << 8);
#endif
src += 3;
}
}
void memcpy_to_p24_from_i16(uint8_t *dst, const int16_t *src, size_t count)
{
while (count--) {
#ifdef HAVE_BIG_ENDIAN
*dst++ = *src >> 8;
*dst++ = *src++;
*dst++ = 0;
#else
*dst++ = 0;
*dst++ = *src;
*dst++ = *src++ >> 8;
#endif
}
}
void memcpy_to_p24_from_float(uint8_t *dst, const float *src, size_t count)
{
while (count--) {
int32_t ival = clamp24_from_float(*src++);
#ifdef HAVE_BIG_ENDIAN
*dst++ = ival >> 16;
*dst++ = ival >> 8;
*dst++ = ival;
#else
*dst++ = ival;
*dst++ = ival >> 8;
*dst++ = ival >> 16;
#endif
}
}
void memcpy_to_p24_from_q8_23(uint8_t *dst, const int32_t *src, size_t count)
{
while (count--) {
int32_t ival = clamp24_from_q8_23(*src++);
#ifdef HAVE_BIG_ENDIAN
*dst++ = ival >> 16;
*dst++ = ival >> 8;
*dst++ = ival;
#else
*dst++ = ival;
*dst++ = ival >> 8;
*dst++ = ival >> 16;
#endif
}
}
void memcpy_to_q8_23_from_i16(int32_t *dst, const int16_t *src, size_t count)
{
while (count--) {
*dst++ = (int32_t)*src++ << 8;
}
}
void memcpy_to_q8_23_from_float_with_clamp(int32_t *dst, const float *src, size_t count)
{
while (count--) {
*dst++ = clamp24_from_float(*src++);
}
}
void memcpy_to_q4_27_from_float(int32_t *dst, const float *src, size_t count)
{
while (count--) {
*dst++ = clampq4_27_from_float(*src++);
}
}
void memcpy_to_i16_from_q8_23(int16_t *dst, const int32_t *src, size_t count)
{
while (count--) {
*dst++ = clamp16(*src++ >> 8);
}
}
void memcpy_to_float_from_q8_23(float *dst, const int32_t *src, size_t count)
{
while (count--) {
*dst++ = float_from_q8_23(*src++);
}
}
void memcpy_to_i32_from_i16(int32_t *dst, const int16_t *src, size_t count)
{
while (count--) {
*dst++ = (int32_t)*src++ << 16;
}
}
void memcpy_to_i32_from_float(int32_t *dst, const float *src, size_t count)
{
while (count--) {
*dst++ = clamp32_from_float(*src++);
}
}
void memcpy_to_float_from_i32(float *dst, const int32_t *src, size_t count)
{
while (count--) {
*dst++ = float_from_i32(*src++);
}
}
void downmix_to_mono_i16_from_stereo_i16(int16_t *dst, const int16_t *src, size_t count)
{
while (count--) {
*dst++ = (int16_t)(((int32_t)src[0] + (int32_t)src[1]) >> 1);
src += 2;
}
}
void upmix_to_stereo_i16_from_mono_i16(int16_t *dst, const int16_t *src, size_t count)
{
while (count--) {
int32_t temp = *src++;
dst[0] = temp;
dst[1] = temp;
dst += 2;
}
}
size_t nonZeroMono32(const int32_t *samples, size_t count)
{
size_t nonZero = 0;
while (count-- > 0) {
if (*samples++ != 0) {
nonZero++;
}
}
return nonZero;
}
size_t nonZeroMono16(const int16_t *samples, size_t count)
{
size_t nonZero = 0;
while (count-- > 0) {
if (*samples++ != 0) {
nonZero++;
}
}
return nonZero;
}
size_t nonZeroStereo32(const int32_t *frames, size_t count)
{
size_t nonZero = 0;
while (count-- > 0) {
if (frames[0] != 0 || frames[1] != 0) {
nonZero++;
}
frames += 2;
}
return nonZero;
}
size_t nonZeroStereo16(const int16_t *frames, size_t count)
{
size_t nonZero = 0;
while (count-- > 0) {
if (frames[0] != 0 || frames[1] != 0) {
nonZero++;
}
frames += 2;
}
return nonZero;
}
/*
* C macro to do channel mask copying independent of dst/src sample type.
* Don't pass in any expressions for the macro arguments here.
*/
#define copy_frame_by_mask(dst, dmask, src, smask, count, zero) \
{ \
uint32_t bit, ormask; \
while (count--) { \
ormask = dmask | smask; \
while (ormask) { \
bit = ormask & -ormask; /* get lowest bit */ \
ormask ^= bit; /* remove lowest bit */ \
if (dmask & bit) { \
*dst++ = smask & bit ? *src++ : zero; \
} else { /* source channel only */ \
++src; \
} \
} \
} \
}
void memcpy_by_channel_mask(void *dst, uint32_t dst_mask,
const void *src, uint32_t src_mask, size_t sample_size, size_t count)
{
#if 0
/* alternate way of handling memcpy_by_channel_mask by using the idxary */
int8_t idxary[32];
uint32_t src_channels = popcount(src_mask);
uint32_t dst_channels =
memcpy_by_index_array_initialization(idxary, 32, dst_mask, src_mask);
memcpy_by_idxary(dst, dst_channels, src, src_channels, idxary, sample_size, count);
#else
if (dst_mask == src_mask) {
memcpy(dst, src, sample_size * popcount(dst_mask) * count);
return;
}
switch (sample_size) {
case 1: {
uint8_t *udst = (uint8_t*)dst;
const uint8_t *usrc = (const uint8_t*)src;
copy_frame_by_mask(udst, dst_mask, usrc, src_mask, count, 0);
} break;
case 2: {
uint16_t *udst = (uint16_t*)dst;
const uint16_t *usrc = (const uint16_t*)src;
copy_frame_by_mask(udst, dst_mask, usrc, src_mask, count, 0);
} break;
case 3: { /* could be slow. use a struct to represent 3 bytes of data. */
uint8x3_t *udst = (uint8x3_t*)dst;
const uint8x3_t *usrc = (const uint8x3_t*)src;
static const uint8x3_t zero; /* tricky - we use this to zero out a sample */
copy_frame_by_mask(udst, dst_mask, usrc, src_mask, count, zero);
} break;
case 4: {
uint32_t *udst = (uint32_t*)dst;
const uint32_t *usrc = (const uint32_t*)src;
copy_frame_by_mask(udst, dst_mask, usrc, src_mask, count, 0);
} break;
default:
abort(); /* illegal value */
break;
}
#endif
}
/*
* C macro to do copying by index array, to rearrange samples
* within a frame. This is independent of src/dst sample type.
* Don't pass in any expressions for the macro arguments here.
*/
#define copy_frame_by_idx(dst, dst_channels, src, src_channels, idxary, count, zero) \
{ \
unsigned i; \
int index; \
while (count--) { \
for (i = 0; i < dst_channels; ++i) { \
index = idxary[i]; \
*dst++ = index < 0 ? zero : src[index]; \
} \
src += src_channels; \
} \
}
void memcpy_by_index_array(void *dst, uint32_t dst_channels,
const void *src, uint32_t src_channels,
const int8_t *idxary, size_t sample_size, size_t count)
{
switch (sample_size) {
case 1: {
uint8_t *udst = (uint8_t*)dst;
const uint8_t *usrc = (const uint8_t*)src;
copy_frame_by_idx(udst, dst_channels, usrc, src_channels, idxary, count, 0);
} break;
case 2: {
uint16_t *udst = (uint16_t*)dst;
const uint16_t *usrc = (const uint16_t*)src;
copy_frame_by_idx(udst, dst_channels, usrc, src_channels, idxary, count, 0);
} break;
case 3: { /* could be slow. use a struct to represent 3 bytes of data. */
uint8x3_t *udst = (uint8x3_t*)dst;
const uint8x3_t *usrc = (const uint8x3_t*)src;
static const uint8x3_t zero;
copy_frame_by_idx(udst, dst_channels, usrc, src_channels, idxary, count, zero);
} break;
case 4: {
uint32_t *udst = (uint32_t*)dst;
const uint32_t *usrc = (const uint32_t*)src;
copy_frame_by_idx(udst, dst_channels, usrc, src_channels, idxary, count, 0);
} break;
default:
abort(); /* illegal value */
break;
}
}
size_t memcpy_by_index_array_initialization(int8_t *idxary, size_t idxcount,
uint32_t dst_mask, uint32_t src_mask)
{
size_t n = 0;
int srcidx = 0;
uint32_t bit, ormask = src_mask | dst_mask;
while (ormask && n < idxcount) {
bit = ormask & -ormask; /* get lowest bit */
ormask ^= bit; /* remove lowest bit */
if (src_mask & dst_mask & bit) { /* matching channel */
idxary[n++] = srcidx++;
} else if (src_mask & bit) { /* source channel only */
++srcidx;
} else { /* destination channel only */
idxary[n++] = -1;
}
}
return n + popcount(ormask & dst_mask);
}